blink_merge.lua

#!/usr/bin/lua

-- if #arg ~= 1 then
--   print("Missing sketch file name")
--   return 1
-- end

local uploaded_name = "./Blink.ino.hex"

local destination_file = "./mega2560.hex"

local io = require("io")
local uploaded_sketch = io.open(uploaded_name)
if not uploaded_sketch then
  print("Unable to open file " .. uploaded_name .. " for reading")
  return 1
end

local sketch = {}
for line in uploaded_sketch:lines() do
  table.insert(sketch, line)
end
uploaded_sketch:close()

--removes last line
table.remove(sketch)

for line in io.lines("./stk500boot_v2_mega2560.hex") do
  table.insert(sketch, line)
end

local final_sketch = io.open(destination_file, "w+")
if not final_sketch then
  print("Unable to open file " .. uploaded_name .. " for writing")
  return 1
end

for idx, line in ipairs(sketch) do
  line = string.gsub(line, "\n", "")
  line = string.gsub(line, "\r", "")
  line = string.gsub(line, " ", "")
  if line ~= "" then
    final_sketch:write(line)
    final_sketch:write("\n")
  end
end

final_sketch:flush()
final_sketch:close()

return 0